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INDONESIA
Jurnal Teknik Elektro
Published by Universitas Trisakti
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Electrical & Electronics Engineering
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue " Vol 2, No 1 (2002)" : 5 Documents clear
Analisis Unjuk Kerja Jaringan Pensinyalan No.7 Ningsih, Yuli Kurnia
Jurnal Teknik Elektro Vol 2, No 1 (2002)
Publisher : Jurnal Teknik Elektro

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Abstract

This paper analyses the performance of the signalling network No.7, based on its Grade OfService (GOS). Computer software is designed and employed, based on Visual Basic 6.0 tosimulate the Signalling Network System which is based on CCS No.7. The facilities of thissimulation software is so designed as to enable the user to change inputs, using differentvalues: number of nodes, average traffic, internode distance, routing, transmission medium,number of channel. This in turn would make it possible to analyse the efficiency of thenetwork and, hence the optimum performance desired.Keywords: Grade of Service (GoS), Routing, Message Signal Unit (MSU)
DASAR-DASAR VOICE OVER INTERNET PROTOKOL Prawiroredjo, Kiki
Jurnal Teknik Elektro Vol 2, No 1 (2002)
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Abstract

Voice over IP (VoIP) technology enables the real time transmission of voice signals aspacketized data over IP networks that employ the Transmission Control Protocol (TCP),Real Time Transport Protocol (RTP), User Datagram Protocol (UDP), and InternetProtocol (IP) suite. In VoIP systems, analog voice signals are digitized and transmitted as astream of packets over a digital data network. IP networks allow each packet toindependently find the most efficient path to the intended destination, thereby best using thenetwork resources at any given instant. The packets associated with a single source may thustake many different paths to the destination in traversing the network, arriving with differentend to end delays, arriving out of sequence, or possibly not arriving at all. At the destination,however, the packets are reassembled and converted back into the original voicesignal.VoIP technology insures proper reconstruction of the voice signals, compensating forechoes made audible due to the end to end delay, for jitter and for dropped packets.Variation among VoIP products include the algorithms and implementations used to supportdynamic bandwidth allocation, packet loss recovery, adaptive echo cancellation and speechprocessing to deliver voice quality as high as possible.Keywords: Voice over IP (VoIP), gateway, Digital Signal Processing (DSP)
Case Based Reasoning in Engineering Design Gozali, Ferrianto
Jurnal Teknik Elektro Vol 2, No 1 (2002)
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Abstract

Design is an activity that requires not only fundamental knowledge in the domain of theapplication and understanding of the interactions with other aspects such as ergonomic,economic, technical and social but also creativity of designers. To generate innovativesolutions, expert designers often use their experiences, the history of failed as well assuccessful designs, as a valuable information source to help them to solve a current designproblem. For beginners, such information is even more valuable. Thus, experiences earnedfrom previous design processes can be a rich source of ideas and inspiration in every stageof design. Case-based reasoning or CBR is a methodology in automated reasoning andmachine learning. In CBR, a reasoner solves a new problem by searching for the similarityof the problem to one or several previously solved problems stored as cases in the case baseand then adapting their known solutions instead of working out a solution from scratch.Designers analyse the design problem through formal methods, but creating a new designrequires previous experiences, or at least, exposure to anothers design experiences. InCase-based design, CBR supports a design process by reminding designers of previousdesign experiences that can help to solve new design problems. This paper describes apreliminary survey of CBR application in design to support the research of CBR applicationin engineering design education. A CBR basic concept will be explored first followed by ageneral step of engineering design process. It is also described issues raised by theapplication of CBR in design process, and finally we propose the possibilities of introducinga CBR method in engineering design education.Keywords: Case Based Reasoning, Engineering Design, Design Case, Case Base.
BOLA PETIR SEBAGAI BENTUK PELEPASAN MUATAN LISTRIK: SUATU KAJIAN TEORITIKAL Abduh, Syamsir
Jurnal Teknik Elektro Vol 2, No 1 (2002)
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Abstract

In order to understand the atmospheric or lightning surges it would be important tounderstand the theory behind lightning.. This paper presents a review of literature of balllightning as a discharge phenomenon. It is assumed that ball lightning is produced andsustained by the electric fields associated with charges from a lightning strike dispersingalong preferred conducting paths in the earth. The theory gives an explanation of theformation, lifetime, energy sources and motion of a ball lightning.Keywords: ball lightning, lightning strike, discharge phenomenon
Virtual Server Gozali, Ferrianto; Alex, Alex
Jurnal Teknik Elektro Vol 2, No 1 (2002)
Publisher : Jurnal Teknik Elektro

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The rapid development of Internet technology can be reflected by the increasing number ofthe Internet users, the complexity of the applications in the Internet and its related computernetwork technology. Nowadays, more and more companies are moving their businesses onthe Internet. Once the companies have decided that they want to utilize the internet tosupport their business activities, their consideration not only based on their needs when thesystem is set up but also the prediction about future condition. Any interrupt or stop ofservices on the servers means business losses, and high availability of these servers becomesincreasingly important. The load on popular Internet sites is growing rapidly, some havealready got tens of millions hits per day. More and more administrators have met theperformance bottleneck problem of their servers, and with the increasing access requests theservers will be easily overloaded for a short time. This condition sometimes exceeds theirprediction when they first set up the system. This paper presents how to create Linux virtualservers or in brief we called LVS. LVS implements parallel processing concepts in the Linuxbased computer network. LVS is a high-performance and highly available server built on acluster of real servers. By utilizing one computer as a LVS Director which is responsible todistribute user accesses, LVS will be able to schedule and distribute the load into number ofLVS real server. In the system, we utilize the method of IP-level load balancing to makeparallel services of the cluster to appear as a virtual service on a single IP address viaNetwork Address Translation. They are two scheduling algorithms used, a Round Robin andWeight Least Cost load balancing. In order to test the performance of the LVS system, anLVS Web server is developed in the Computer System Laboratory, Electrical EngineeringDepartment, Trisakti University. The response of the web server using different number ofreal servers and different load balancing algorithm, round robin and weight least cost, ismonitored.Keywords: Internet, LVS, NAT, komputer Cluster, Round Robin, Weight Least Cost.

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